Engine - Valve Spring Revision

89AMC/jeep02

Models

1989 B1 Vehicles


Subject

Valve Springs Revision - 1.6L DOHC Engine


Index

ENGINE


Date

January 30, 1989


No.

09-51-89


P-265 (C09-01-9)
BODY CODE LEGEND

B1 - Summit


The 1.6L DOHC engine valve springs have been changed. Engines with a built code of HB1118 or higher are equipped with the new springs (PN MD139243). The new springs can be used on earlier engines only if all 16 springs are replaced.


Spring specification:


New Old

Free height 48.3 mm 45.8 mm

Load (when spring is 30 kg 24 kg

40 mm high)

Identification color Blue Yellow

Part No. MD139243 MD121086


Please make a note referencing this TSB 09-51-89 in your 1989 Colt/Summit Import Service Manual (Publication #81-270-9011) Pages 9-14 and 9-128 as shown in Figure.
PAGE 9-14

REFERENCE TSB 09-51-89

Valve spring
Free length mm (in.) 45.8 (1.803) 44.9 (1.768)
Load N (lbs.) 240 (53) at installed height
Out of squareness Less than 1.5~ 4~

FIGURE 1:

VALVE SPRING REFERENCE TSB 09-51-89 N09PGBC1

(1) Measure the free height of the spring and replace if it is out of the limit.

Standard value: 45.8 mm (1.803 in.)
Limit: 44.9 mm (1.768 in.)

(2) Check the spring for squareness and replace if the limit is exceeded.

Standard value: Less than 1.5~
Limit: 4~
POLICY: Information only.